Window lock and adjuster



June 13, 1950 M. w. HOPPE WINDOW LOCK AND ADJUSTER Filed June 6, 1946 2 Sheets-Sheet 1 MA HQEW W- Hop/=5 QM 406m.

Jun 13, 1950 M. W. HOPPE WINDOW LOCK AND ADJUSTER Filed June 6, 1946 2 Sheets-Sheet 2 llnz'entor k9 MATHEW 8- Hon a WWW Patented June 13, 1950 UNITED STATES PATENT OFFICE WINDOW LOCK AND ADJUSTER Mathew W. Hoppe, Mercedes, Tex.

Application June 6, 1946, Serial No. 674,850

1 Claim. 1

This invention consists of a novel and useful window lock and adjuster and more explicitly pertains to an attachment for windows for positively locking the same at any desired position in their frames.

The principal object of my invention resides in providing a mechanism whereby the usual window sash cord and balance weights may be omitted, thereby permitting a more tightly fitting window frame, without cavities, and which may be more completely sealed and insulated, wherein the window sash may be readily and securely positioned at any desired elevation in its frame, and wherein the window sash may be positively locked at any desired position.

Additional objects are to device a window lock and adjuster, in accordance with the foregoing objects, which may be readily attached to existing windows, is unobtrusive, of simple construction and dependable in operation.

These, together with numerous ancillary objects which will later become apparent as the following description proceeds, are attained by my device, one embodiment of which has been illustrated by way of example only in the accompany- 25 ing drawings, wherein:

Figure 1 is an elevation of a lower portion of a window sash and frame showing the inventionapplied thereto;

Figures 2 and 3 are vertical, sectional detail views taken at right angles to Figure 1 and showing the lock mechanism in released and locked positions respectively;

Figure 4 is a vertical sectional view taken substantially on the line 4-4 of Figure 1 and showing the location of the rack bar in the frame;

Figure 5 is a front elevation of a window showing the device applied to both upper and lower sash;

Figure 6 is a sectional view taken substantially upon the line 6-45 of Figure 5; and

Figure 7 is a horizontal sectional View taken substantially on the line 1-! of Figure 6.

In the accompanying drawings, numeral [0 designates a portion of the frame of a window while 12 designates a portion of a window sash disposed in cooperative relation therewith. As shown best in Figures 6 and 7, I4 indicates the frame guide surfaces for the window sash, which are axially recessed to provide a channel l6 for a purpose to be later set forth. A rack bar l8 having transverse steps or legs '20 is recessed into the guide surfaces 14 in a manner to overlie the channel cavities It. The adjacent edge of the window sash is recessed as at 22 for the purpose 55 of receiving my improved adjusting mechanism to be now set forth. Freely disposed in the compartment 22 is a sprocket 24 having teeth 26 and which is freely rotatable in said cavity and upon an axle 28 which has one extremity recessed or journaled in a socket 30 provided in the sash frame [2. If desired, the socket 30 may be provided with a bushing of any suitable construction. The other edge of the axle 28 is journaled in a bushing 32 which is received in a suitable recess in the frame E2, the axle being apertured to receive a retaining pin 34 disposed immediately outwardly of said bushing 32. A rectangular cover plate 36 is secured to the window sash as by screws 38 or equivalent fastening means and is designed to abut the pin 34 to thereby retain the pin, the bushing 32, and the axle 28 in rigid position in the cavity 22. Adjacent its upper surface, the plate is provided with a rigidly extending pin 40 which constitutes a handle for lifting the window sash as will be readily understood. Disposed adjacent to the handle 40 and in normally parallel relation thereto, is a second handle 42 forming one arm of a bell crank whose other leg is indicated at 44. A slot 46 is provided at the junction of the arms 42 and 44 of the bell crank, and is designed to embrace the flattened extremity of the axle 28 and is pivotally connected thereto as by a pin 48 extending through apertures in the bell crank and in the axle. The arm 44 of the bell crank is slotted or bifurcated as at 50 and these bifurcates are longitudinally slotted as at 52 (see Figures 2 and 3) and are pivotally connected to a latch pin 54 as by a laterally extending pin 56 disposed in an aperture of pin 54 and riding in the slots 52. The latch pin 54 slidably extends through a suitable aperture in the cover plate 36 and is guided in a bushing 58 disposed in the frame It], and selectively engages one of a series of appropriately spaced apertures Bil extending through the sprocket wheel '24. A resilient member 62 extends between the handles 40 and 42 and is designed to normally bias the handle 42 in such direction as to cause the latch pin 54 to engage in an appropriate aperture 60. The resilient member 62 is retained by a base portion 64 disposed between the cover plate 36 and the window frame I2.

From the foregoing explanation, it is believed that the operation of the device will now be readily understood. When it is desired to raise or lower the window, the handles 40 and 42 are grasped, and the handle 42 biased toward the handle 40 against the opposition of spring 62. This movement withdraws the latch 54 from its engaged aperture 60, leaving the sprocket 24 free to rotate upon its axle 28. When the handles 42 and 40 are now raised or lowered, the window sash I2 is likewise moved in its guide M, with the sprocket teeth 26 rolling freely upon the corresponding transverse bars 20 of the rack bars 18. When the desired elevational adjustment has been attained, the handle 42 is released, whereby the spring 62 causes the handle 42 to bias the latch pin 54 into engagement with the properly positioned aperture 60 of gear 24. This operation locks the sprocket 24 against rotational movement, and the engaged tooth 26 of the sprocket securely positions the window without movement relative to the rack bar 1.8.

As will be readily apparent, I may apply this construction with equal facility :to windows having a single sash or to windows having apair of sashes as indicated more clearly in Figures 5 and 6. In applying my invention to new construction, it will be apparent that the customary sash weights and sash cord for balancing the window in order to permit adjustment of the window at any desired height, may be dispensed with, whereby the window casement may closely approach the'window sash and avoid the customary cavities in the window frame which permit the entrance of cold air and the like theret-hrough. By this construction, therefore, the insulating "means of the wallof a building maybe continued directly to the window guide strip, thereby providing better sealing and a better insulated window opening. In applying my invention to existing 'windows, the usual window sash cord and balance weights will be removed, the cavities in the window frame for receiving these members may thencbe properly insulated and sealed, and the relatively narrow "channel member i6 and the rack bars 18 then installed inthe window guides. The cooperating locking means .may then "be suitably positioned in a-mortised chamher in the window sash and the device is ready for use.

Since it is obvious that various modifications may be resorted to within the spirit of my invention, I do not wish to limit myself to the exact construction disclosed, but may avail myself of any suitable modifications falling within the scope of the appended claim.

I claim as my invention:

In a window having a window frame, a sash rslidable in the frame, a rack bar carrier by the frame adjacent the outer edge ofxthe sash, a stub axle extending transversely in the sash, and a sprocket wheel rotatable on the axle and engageable with the rack bar, said sprocket wheel including circumferentially spaced apertures; a lock comprising a plate detachably secured to the sash, said axle having a portion extending through the plate, a first handle rigidly secured to said plate, a bellcrank handle pivotally mounted at its corner to said axle portion, a bifurcated section on said bellcrank handle, a latch pin "secured in said bifurcated section and extending through said plate to lockingly engage one of the apertures provided in the sprocket wheelianda springsecured to said plate and extending between said handles to'normallyurge said latch pin into locking engagement with the sprocket wheel.

MATHEW 'W. HOPPE.

REFERENCES CITED The following references are of record "in the file of this patent:

UNITED STATES PATENTS Number Name Date 584,074 Eastham June 8, 1897 4585,605 Ullin June 29, .1897 725,046 Crawford Apr. 14, '1903 919,311 iBollbach V Apr. :27, 1909 1,839,770 McI-Iugh Jan. 5, 1932 

